632 PROCEEDINGS OF THE ACADEMY OF [DeC, 



ZONITID^. 

 Genus ZONITOIDES Lehm. 



Zonitoides parana n. sp. PI. XXI, figs. 12, 13, 14. 



Shell umbilicate (the diameter of the umbilicus being contained 

 4f times in that of the shell), depressed, with low-conic spire, light 

 brown, rather glossy, with fine, close sculpture of almost exactly 

 vertical growth lines. Whorls 5, very slowly increasing, the last 

 rounded at the periphery. Aperture lunate. 



Alt. 1.5, diam. 0.9 mm. 



A single specimen of this minute species was taken at Para. The 

 genus is uncertain, but the texture of the shell is that of Zonitoides 

 rather than of Thysanophora or any Patuloid genus. 



Genus GUPPYA Morch. 

 Guppya mayi n. sp. PI. XXI, 0. 7. 



Shell very narrowly perforate, conical, with a very obtuse apex 

 and well-rounded base, the last whorl distinctly, but not sharply 

 angulate, the apical angle being about 90 degrees; translucent, 

 slightly shining, with a thin, dull straw-colored, fugaceous epidermis; 

 everwhere sculptured with fine, irregularly spaced, retractive, 

 radiating costulse of varying sizes, crossed by more regular, very finely 

 incised lines, very closely and nearly evenly spaced. Whorls 5, 

 convex; sutures well defined, especially above the last whorl. Aper- 

 ture semilunar, very oblique, slightly broadened above by the angle 

 of the last whorl; peristome sharp, very slightly reflected on the 

 basal portion and more distinctly as it approaches the umbilicus. 



Alt. 3, greatest diam. 3.65, least diam. 3.4 mm. 



Seven specimens of this species, which seems to be new, were taken 

 with the last species at Camp 39, M. & M. R. R. It is more elevated 

 than G. seminlini Moricand and has more whorls. It is named for 

 Mr. R. H. May, of the contracting firm of May, Jekyll & Randolph, 

 who, with Mr. Jekyll, made our trip to the Madeira-Mamore R. R. 

 possible and in every way delightful. 



HELIOIDiE. 



Genus THYSANOPHORA Strebcl and PfefFer. 

 Thysanophora caeca Guppy. 



Helix cce(\a Guppy, Tryon, Man. Conch. (2), III, p. .55, pi. 9, fig. 23. 

 Thysanophora ccBca Guppy, Pilsbry, Man. Conch. (2), IX, pi. lb, hg. 4. 



Eight specimens of this West Indian shell "from the Serra de 

 Baturite, State of Ceara," were sent by Mr. Rocha. This seems to 

 be the first report of its having been taken south of the Amazon. 



